image library

Hi Edna!

A single image is broken down or cropped into smaller thumbnails. The theme resizes the image and create smaller version of the thumbnails. You can find those thumbnail or image sizes on functions.php:

$avia_config['imgSize']['widget'] 			 	= array('width'=>36,  'height'=>36);						// small preview pics eg sidebar news
$avia_config['imgSize']['square'] 		 	    = array('width'=>180, 'height'=>180);		                 // small image for blogs
$avia_config['imgSize']['featured'] 		 	= array('width'=>1500, 'height'=>430 );						// images for fullsize pages and fullsize slider
$avia_config['imgSize']['featured_large'] 		= array('width'=>1500, 'height'=>630 );						// images for fullsize pages and fullsize slider
$avia_config['imgSize']['extra_large'] 		 	= array('width'=>1500, 'height'=>1500 , 'crop' => false);	// images for fullscrren slider
$avia_config['imgSize']['portfolio'] 		 	= array('width'=>495, 'height'=>400 );						// images for portfolio entries (2,3 column)
$avia_config['imgSize']['portfolio_small'] 		= array('width'=>260, 'height'=>185 );						// images for portfolio 4 columns
$avia_config['imgSize']['gallery'] 		 		= array('width'=>710, 'height'=>575 );						// images for portfolio entries (2,3 column)
$avia_config['imgSize']['masonry'] 		 		= array('width'=>705, 'height'=>705 , 'crop' => false);		// images for fullscreen masonry
$avia_config['imgSize']['entry_with_sidebar'] 	= array('width'=>710, 'height'=>270);		                 // big images for blog and page entries
$avia_config['imgSize']['entry_without_sidebar']= array('width'=>1030, 'height'=>360 );						// images for fullsize pages and fullsize slider

//overwrite blog and fullwidth image on extra large layouts
if(avia_get_option('responsive_layout') == "responsive responsive_large")
{
	$avia_config['imgSize']['gallery'] 		 		= array('width'=>845, 'height'=>684 );					// images for portfolio entries (2,3 column)
	$avia_config['imgSize']['entry_with_sidebar'] 	= array('width'=>845, 'height'=>321);		            // big images for blog and page entries
	$avia_config['imgSize']['entry_without_sidebar']= array('width'=>1210, 'height'=>423 );					// images for fullsize pages and fullsize slider
}

It is quite normal for a wp installation to have different sizes for a single image.

Best regards,
Ismael